What do you guys recommend for boosting cell signal when you don't have access to the modem. I live in a shared house in the basement and its starting to get hard to use truphone. I do have google voice but the wifi isn't the most reliable. Also hoping I don't need to change carriers because I do love my current (Google Voice + Truphone + [strike]FreedomPop[/strike]RedPocket) setup. Primary provider is ATT towers. Any and all help is greatly appreciated.